public class LQB_code1_6add {
    public static void main(String[] args) {
        int a = 1; //第一天的钱
        int sum = 0; //总钱数
        int day = 0; //天数
        while (true){
            sum +=a;
            day++;
            if(sum>=108){
                break;
            }
            a +=2;
        }
        System.out.println(day);
    }
}
